# Relationship history for MSHA mine 1515045

Current hierarchy: **Paul E  Roberts → Miracle Mining Company Inc → #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Thornsberry Construction Company → #1; 1985-01-01 to 1986-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Thornsberry David → #1; 1985-01-01 to 1986-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Thornsberry David → Thornsberry Construction Company; 1985-01-01 to 1986-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Miracle Mining Company Inc → #1; 1986-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul E  Roberts et al → #1; 1986-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul E  Roberts et al → Miracle Mining Company Inc; 1986-11-30 to current/open; source msha-controller-operator-history